The Ironmen have not and have no intention of playing USPL as a team because they choose of focus on X-ball style 5 man play. However some Ironmen players "guest" on USPL Dye sponsored teams (Ollie plays for Arsenal)

Also take into consideration the amount involvement DYE has in the PSP (think lots and lots of $$$), Ironmen are the DYE factory team, and the USPL is the closest national level competitor PSP has....